Spring frame



May 25 1926. 1,585,894

c. F. CODA SPRING FRAME Filed Nov, 1, 1923 2 Sheets-Sheet 1 3141mm izrzsiapzerf Coda C. F. CODA SPRING'FRAME May 25 1926 Filed Nov. 1, 1923 2 Sheets-Sheet 2 auuenkom Cilris'apfierf 506 a Patented May 25, 1925.

PATENT OFFICE.

CHRISTOPHER F. CODA, 0F DETROIT, MICHIGAN, ASSIGNOR T0 JENKS AND MUIR MANUFACTURING CO., OF DETROIT, MICHIGAN, A CORPORATION OF srnING FRAME.

The invention relates to spring frames of that type designed for use in cushion seats, and the invention has more particular reference to the construction of the base frame and the metallic strip for forming the same. It is the object of the invention to obtain a strip which is adapted for direct engagement with the spring coils and the skirt of the cushion and one which permits of readily bending and fashioning into the frame without distortion, which would interfere with its other functions. To this end the inven tion consists in the construction and method of forming the strip as hereinafter set forth.

Inthe drawings: I

Figure 1 is a section through the spring seat embodying my invention;

Figure 2 is a plan view thereof;

Figure 3' is a perspective View showing the spring attached to the base;

Figure 4 is a perspective view of the base strip;

Figure 5 is a sectional elevation illustrating the manner of clinching the spring to the base;

Figures 6 and 7 are respectively a cross section and plan view showing the manner of fashioning the strip;

Figure 8 is a section showing the skirt secured to the strip.

In the construction of spring frames of the type referred to it is usual to form an annular base frame to which the outer row of springs are attached with cross strips for supporting the intermediate rows of springs. This annular frame also forms a means for securing the skirt or fabric cover which depends from the cushion tops and encloses the springs. Various constructions of bars formed from sheet metal have been employed for constructing this frame, but where the bar is bent at the corners of the frame, it is difficult to maintain the cross section without distortion. Consequently, if the bar is of cross-section which provides grooves or channels for engaging the springs and the edge of the skirt, the bending of the bar will frequently close these channels so as to render the construction practically inoperative. My improved construction is of such a character as to permit of readily bending the bar to form the annular frame while maintaining the cross section free from distortion so that at the corners as well as in 1, 1923. Serial No. 672.190.

the straight portions of the frame the springs-and skirt may be readily attached.

In detail, A is a sheet metal strip which is bent at B to form the open channel C, bothsides of which are return-bent at D and D. The upper return-bent portion is further bent to form an upstanding flange E which is substantially in alignment with the bend B. tends outward beyond the bend B and is provided with an upturned flange F, leaving between the same and the flange E and bend B. an open channel G. I v

A. strip of the cross section justdescribed may be readily fashioned into an annular frame without distortion. Thus as shown in Figs. 6 and 7, the bending of the strip is effected by means of a form'orjig H having a lever I pivotallysecured thereto at J. The lever is further provided with a depending pin K which enters the channel G and with a roller L which bears on the outer side of the flange F. The form H has a portion concentric with the pivot J and thus when the lever is engaged with the strip and turned about the pivot, it will conform the strip to the jig without distorting the cross section.

When the annular frame is formed, the springs may be secured thereto by insertion of the base ring M of each spring into the channel C. By then using a suitable pinching tool. such. as N, the return-bends D and D can be clinched about the ring M. A lug O on the tool N which extends into the channel G will serve to guide the tool in this operation and also prevents closing of said channel.

The top of the frame may beformed of wire as indicated at P, which frame is clipped or otherwise secured to the top coils of the springs. The cushion Q supported on this top frame is provided with a depending skirt R, which at its lower end is preferably corded, as indicated at S. This corded edge is secured to the base frame by first depressing the springs, then inserting the edge in the channel G and then closing or bending inward the flange F so as to clamp the cord, as shown in Figure 8.

The construction as described is one which can be practically manufactured and applied and when complete forms a secure attachment both for the springs and the skirt.

The lower returnbent portion ex The fact that both flanges E and F extend upward coupled with: the fact thatthe flange E issubstantially in vertical: alignment with the bend B permits of bending: the strip at the corners without closing the channel G.- In other words,- this construction permits the bending tool to obtain a bearing on both the flange E and the bend B so that these portions may be bent independent of any pressure on the outer flange F.

What I claim as my inventionis? 1 In a spring frame, a sheet metal strip bent and return bent to form a channel with two ply sides, the upper of said return bent portions terminating in an upturnedflange in substantial vertical alignment with the bend forming the channel and the lower of said return bent portions extending outward beyond the bend of the channel and provided with an upturned flange formix'lg between the same and the first-mentioned flange an upwardly opening channel adapted to be closed by the inward bending ot the last mentioned flange;

2; A spring'frame, a base' strip: formed of sheet metal bent and return ben-t'to form an inwardly opening channel with two pli'y sides, the upper return bent portion terminating in an upturned flange in substantial vertical alignment with the bend forming the channel and the lower return bent portion extending beyond said bend and being provided with an upturned flange spaced from said first mentioned flange to form an upwardly opening. channel for receiving the cushion skirt, whereby said skirt may be clamped and secured by the inward bending of said outer flange.

3.111 a spring, frame, a base strip formed of sheet metal bent and return bent to form an: inwardly opening channel with two ply sides, the upper return bent portion tcrminating in an upturned flange in substantial vertical alignment with the bend o l. the channel, the lower return bent portion extending beyond said bend and tern-iinating in an upturned flange spaced from said: first mentioned flange, said strip being bent to form an annular frame, springs having their base coils engaging the channelof said frame and secured" theretoby the clinching of said returirbent portions, and a skirt having a beaded lower edge engaging the upwardly opening channel, the outer flange thereof being bent inward to clamp and retain said beaded edge.

In testimony whereof I afiix my signature.

@HRI'S'FOPHERT 1?. 6013A. 

